7
QuizMultiple Choice
Oxidation-Reduction — Unit test
Question 7 • 2026-2027_MDCPS_2003345_Chemistry_1_B-CR
The atomic symbol represents lead-206 (Pb-206), an isotope that has 82 protons and 124 neutrons. Which atomic symbol could represent an isotope that undergoes radioactive decay to produce Pb-206?
Answer
A
Superscript 238 subscript 92 upper U.
B
Superscript 222 Subscript 87 upper P b
C
Superscript 178 subscript 72 upper H f.
D
Superscript 192 subscript 77 upper P b.